Gauge for setting taper attachments for machine tools



June 5, 1951 l.. LOWE 2,555,351

GAUGE FOR SETTING TAPEK ATTAGHMENTS FOR MACHINE 'rooLs Filed May 18, 194e 1 -1e B s, s mouse "7. x4 f'z g. 2

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Anon/vc: 1,. Lon/f ATTORNEYS Patented June 5, 1951 UNITED STATES PATENT OFFICE GAUGEFOR SETTING TAPER ATTACH- MEN TS FOR MACHINETOOLS Lawrence L. Lowe; Grosse Pointe, Mich.

Application May 18, 1948Seri`al No. 27,758

2 Claims;

1 Many machine tools include attachments for forming a uniform taper on a workpiece. Moreover, such attachments usually include dials,

ywhereby the attachment is ytheoretically settable tachment must be made through actual trial and error, whereby in the usual and present methods a number of work pieces are usually ruined before the correct taper angle of the attachment is attained.

With the foregoing in view, it is an object of my invention to provide an improved gauge for setting the taper attachments of machine tools.

A further object is to provide an improved gauge for setting a taper attachment of machine tools, which gauge is adjustable to designate an infinite number of taper angles.

A further object is to provide an improved gauge such as that last described whereinlmeans are provided for pre-setting the gauge toa'number of pre-selected taper angles.

A further object isl to provide an improved gauge for setting the taper attachments of machine tools which includes a base, said base being mountable in operative association with said attachment, a sine bar pivoted to` said base, means for setting said sine bar to. designate an infinitev number of. taper angles and provide means forl setting said attachment to correspond to the setting of said sine bar.

Other objects and advantages reside in the particular structure of the device, combinationand arrangement of the several elementsA thereof; and will be readily understood by those skilled in the art. upon reference to the attached drawing in connection with the following. specification, wherein the invention is shown, described andL claimed.

InV the drawing:

Figure. 1 is an elevational View of one `.Side-of the gauge according to the invention,l parts being broken away and shown in longitudinal` vertical section;

Figure 2V is an elevational- View showing the opposite side of the gauge of Figure 1;

Figurey 3 is a plan view of Figure 1, parts beingr broken awayand shown in horizontal section;

Figure 4 is an end elevation looking from the right of Figure 1;

Figure 5 is a transverse vertical sectional view taken substantially on the plane of the' line 5-5 of Figure 2;

Figure 6 is a transverse vertical sectional View 2 takenv substantially on the planes of the line 6-6 of Figure 2;

Figure'? isa transverse vertical sectional View taken 'substantially on the plane of theline 1"-1 of Figure 1, and showing means applied to the gauge for locking the same in a predetermined" position.

The gauge according to the present invention comprisesv a substantially rectangular block or base` It, the opposite ends of which are formed with aligned conical recesses H', whereby the base may beireadily mounted between the centers of a lathe. An upper side portion of the block l0 is cutaway to provide a level surface parallel to the bottom of the block and comprising an anvil i2.. The same side of the base l0 is recessed adhinge plate inplace, through. that portion of the hinge plate above jacentvone end to provide a seat I3 for a hinge plate i4. The hinge plate I4v seats in the recess. |.3 so that` the outer surface thereof is flush with the,v corresponding side surface of the base l0. The hinge; plate I4 likewise includes a longitudinally-directed shoulder i5 which seats atop an end portion of the anvil i2. Any suitable means, such as thescrew I6, is extended through the hinge Yplate I4` into. the base lil) tosecure the A hinge pin i7 is extended the anvil IZand likewise through the flange i8 provided bythe side of the base removed from the anvil. Alongitudinally-extending groove I8. is formed in the base Ill between the anvil l2 and` the rear Aiiange I3 1 aforesaid.

The flange I-.8 isformed with a plurality of 4 holes. 20' extending laterally therethrough in spaced relation to each other. As shown, the holes 2-0 may provide an upper and lower series. Likewise, the holes; 26:1 are preferably tapered, whereby the holes are gradually reduced in di ametercfroin the outside of the flange I to the inside thereof. The holes 20 are of the same size and of a uniform taper. Each of the holes is designated. by suitable indicia, as shown, to designate certain standard tapers or the like, as will be apparent. later. Thus, the indiciaYNU-Zl designates a neutral position ofthe gauge.` Like; wise, the indicia NIS-22 designates a milling machine standard taper.

The gauge according to the invention includes anelongated sine bar 23 which is substantially T'- shaped in cross-section to provide a substantially horizontally-disposed vrunner 24 and a legV 25. The sine bar 233V `is coextensive in length with the base I@ and the runner ,24 is coextensive in width with the base l0. The leg 25 of the sine bar is journaled on the hinge pin l1 aforesaid. Likewise, the leg 2.5 of the sine bar is sub stantially complementary to the groove i9 formed in the base l0 and the lower portions of the leg are seated in said groove, but do not seat against the floor of such groove. Likewise, al1- ing aperture 26 a single aperture which is corre-Y spondingly tapered throughout its length for a purpose to be apparent later. Although the apertures 26 in the ange I8 may comprise upper and lower horizontally-aligned rows of apertures, it should be noted that the apertures 26 are not in alignment either horizontally or vertically, whereby but a single one of such apertures 26 may be aligned with but a single aperture 2U. Referring now to Figure rI, there is provided a tapered pin 21 which is complementary to the taper of the apertures 20 and 26, whereby when the same is inserted therein, the sine bar 23 is locked in angular relation to the anvil I2 and designates a predetermined taper angle. The pin 2'I may be provided with a head 26 to facilitate removal and insertion of the pin in aligned apertures. By providing a tapered set of apertures, and a tapered pin, the pin may be rmly seated therein against misalignment of the sine bar and anvil and prevents wobbling of the sine bar incident to normal wear.

The apertures 26 in the flange I8 designate a large number of standard tapers, whereby thev gauge may be rapidly set when a standard taper corresponding to one of the apertures 2l] is to be used. Then, with the base l mounted on the machine tool in operative relation to the taper attachment thereof, any suitable gauge may be substituted for the cutting tool and applied to the upper surface of the runner 24 of the sine bar 23. Thereafter, the taper attachment of the tool may be manipulated until perfect alignment of the attachment is `achieved relative to the sine bar. Then a tool, a cutting tool, may be substituted for the gauge aforesaid and the gauge according to the invention removed and a work piece substituted therefor. Thus, where the gauge I0 is used with a lathe, the base is mounted between the lathe centers by means of the recesses II formed in the ends of the gauge.

While the alignable apertures 2|) and 26 take in all or virtually all of standard tapers, it is sometimes necessary to provide a setting which is non-standard and which may be of any angle between zero and 90. With the foregoing in view, means have been provided for setting the sine bar to designate an innite number of tapers and such means will now be described. To accomplish this purpose, a pin 29 is countersunk into the leg 25 of the sine bar 23 and adjacent the opposite end from the hinge pin I'I. Such pin 26 extends transversely of the leg 25, as is best seen in Figure 5, and includes an extension 3S which is cylindrical in form and which extends laterally outwardly of the leg 25 over the anvil l2. Such extension 3D provides a journal for a roller 3| which is secured in place by means of a cap screw 33 threaded into an axial bore 32 of the extension 30. It is intended that the roller 3| have a close t on thel journal-providing extension 3|) and will normally engage the anvil I2 when the sine bar is in the neutral position. Such position occurs when the aperture 26 designated by the indicia 2| is aligned with the corresponding aperture 26 of the sine bar, and this position is shown in Figure 1. With the parts in this position, the pin 21 may be inserted through. the aligned apertures to lock the sine bar in the neutral position. When an adjustment is required which is not standard or covered by an aperture 26, it is only necessary to interpose suitable gauge blocks between the roller 3| and the anvil I2 until the sine bar extends from the anvil at the desired taper angle. By providing a cylindrical surface on the extension 36, such as the roller 3l, a contact with such gauge block comprises a knife edge contact, whereby an accurate adjustment can be obtained. Likewise, it is within the contemplation of the invention to remove the roller from the journal-providing portion 36 and apply the gauge block directly between the portion 30 and the anvil I2 in some instances.

Thus, while the alignable apertures 20 and 26 comprise means for rapidly pre-setting the gauge to a desired taper, the extension 3U and/or the roller 3| provide means for achieving an infinite number of taper settings.

The device according to the invention has a wide variety of uses in addition to those specied hereinabove. For instance, the device is extremely useful in layout work in the tool, die and pat-- tern-making industries. Moreover, the device may be used for checking and inspecting finished work by reason of the great accuracy thereof. Also, the device according to the invention is useful in the making of templates and in the making of scale models.

While I have shown and described what is now thought to be a preferred embodiment of the invention, it is to be understood that the same is susceptible of other forms and expressions. Consequently, I do not limit myself to the precise structure shown and described hereinabove except as hereinafter claimed.

I claim:

1. A taper attachment setting gauge comprising an elongated base formed on one side thereof with a longitudinally extending anvil and with a linear slot disposed intermediate said anvil and the other side of said base, an elongated sine bar having one end thereof'positioned within said slot adjacent one end of said base and pivotally attached to the latter for swinging movement into and out of said slot and toward and away from said anvil to define a plurality of taper angles in conjunction with the latter, and means for securing said sine bar in a taper angle position relative to said anvil, whereby to provide a fixed gauge for setting a taper attachment, said means comprising a rst set of uniformly tapered apertures provided in said sine bar, a second set of uniformly tapered apertures provided in said other side of said base, each of said first set of apertures being alignable with a select one of the apertures of said second set upon movement of said sine bar, and a tapered plug extending through the aligned pair of apertures.

2. A taper attachment setting gauge comprising an elongated base formed on one side thereof with a longitudinally extending anvil and with a linear slot disposed intermediate said anvil and the other side of said base, an elongated sine bar having one end thereof positioned within said slot adjacent one end of said base and pivotally attached to the latter for swinging movement into and out of said slot and toward and away from said anvil to define a plurality of taper angles in conjunction with the latter, said sine bar being formed with a lateral extension adjacent the other end thereof overlying said anvil, a roller rotatably supported on said lateral extension with its periphery adapted to rest upon said anvil, said anvil and roller being adapted to have gauge blocks interposed therebetween to set said sine bar with respect to said anvil to dene an infinite number or" taper angles.

LAWRENCE L. LOWE.

REFERENCES CITED The following references are of record in the le of this patent:

Number 6 UNITED STATES PATENTS Name Date Williams July 1, 1913 Hollandt Aug. 18, 1914 Karasick Mar. 14, 1922 Allen Dec. 4, 1923 Newmaier Feb. l0, 1925 Bensen Oct. 13, 1936 Jones Sept. 19, 1939 Ackerson Apr. 17, 1945 Baum Sept. 25, 1945 Silvermaster Apr. 9, 1946 Knapp Oct. 21, 1947 Vancura June 15, 1948 

